scsi: aacraid: Added new IWBR reset

scsi: aacraid: Added new IWBR reset

BugLink: http://bugs.launchpad.net/bugs/1668726
Added a new IWBR soft reset type, reworked the IOP reset interface for
a bit.

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Dave Carroll <David.Carroll@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from linux-next commit 3136432956501f071891c3d4b6194feb2df924a5)
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>